One would expect regex when it is named match.
Current options cannot be used to match our naming standard. At least more complex conditions needed, for example multiple asterisks.
But why invent something new, when there is a good and relative standard way of doing this (already supported by .net).

We definitely recognize the popularity of this feature, and we discuss it constantly during the planning phases. However there are certain technical limitations in the system that add a large amount of development cost. Because of the cost and the fact that there is a workaround available, other features get prioritized over this one.

That being said, please keep voting for it. The popularity of the feature does help bring it up and makes us reconsider every time.

Hi all, a quick update here. We are looking at different options in allowing this customization. We understand that this is very important when you want to keep the look of the emails consistent with your brand to avoid confusing your users. We should have another update in the coming months as we figure out how to accomplish this.